Oppo K12 Plus 5G vs Xiaomi 14 Ultra
Compare Oppo K12 Plus 5G vs Xiaomi 14 Ultra side by side: Qualcomm Snapdragon 7 Gen 3 vs Qualcomm Snapdragon 8 Gen 3, 50MP vs 50MP camera, 6400mAh vs 5000mAh…
Oppo
Oppo K12 Plus 5G
$279
4categories won
Xiaomi
14 Ultra
$1,299
14categories won
3 categories tied · 21 scored in total · add a third phone
Which one wins?
Xiaomi 14 Ultra takes the overall win
The Xiaomi 14 Ultra proves superior overall against the Oppo K12 Plus 5G, outperforming on gaming and photography. For battery longevity and charging speed, the Oppo K12 Plus 5G takes the lead, while the 14 Ultra is the clear choice for demanding 3D gaming and heavy multitasking. Choose the 14 Ultra if you want the highest performance ceiling, or opt for the Oppo K12 Plus 5G if its lower retail price better fit your budget.
Oppo K12 Plus 5G wins on endurance with 6,400 mAh and 80W fast charging.
14 Ultra provides greater sustained gaming output with its Qualcomm Snapdragon 8 Gen 3 and 16GB RAM.
14 Ultra takes photography with 50MP optics and 5x optical telephoto capabilities.
Oppo K12 Plus 5G provides a sharper value proposition, coming in at $279 vs $1299.
Category verdicts are computed algorithmically from verified technical specifications and hardware benchmarks. Rows where neither figure is objectively better — screen size preference, operating system choice, aesthetic build materials — are displayed for direct reference without scoring bias.
Oppo K12 Plus 5G vs 14 Ultra: specifications compared
Display
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| Screen size | 6.7" | 6.73" |
| Resolution | 1080 x 2412 | 1440 x 3200Winner |
| Pixel density | 394 ppi | 522 ppiWinner |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1100 nits | 3000 nitsWinner |
Performance
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| Chipset | Qualcomm Snapdragon 7 Gen 3 | Qualcomm Snapdragon 8 Gen 3 |
| Process node | 4 nm | 4 nm |
| AnTuTu score | 820,000 | 2,050,000Winner |
| Geekbench multi | 3380 | 6980Winner |
| Maximum RAM | 12 GB | 16 GBWinner |
| Maximum storage | 512GB | 1TBWinner |
Camera
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| Main sensor | 50 MP | 50 MP |
| Rear cameras | 2 | 4Winner |
| Optical zoom | — | 5x |
| Ultrawide | 8 MP | 50 MPWinner |
| Selfie camera | 16 MP | 32 MPWinner |
| Max video | 4K@30fps, 1080p@60fps | 8K at 30fps, 4K at 120fps Dolby Vision |
Battery and charging
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| Capacity | 6,400 mAhWinner | 5,000 mAh |
| Wired charging | 80 W | 90 WWinner |
| Wireless charging | No | 80 WWinner |
Design
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| Weight | 192 gWinner | 220 g |
| Thickness | 8.37 mmWinner | 9.2 mm |
| Water resistance | IP54 | IP68 |
| Build | Diamond anti-drop architecture, frosted composite back, double-strengthened glass front | High-strength aluminum unibody, nano-tech vegan leather back |
Software and support
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| Operating system | Android 14 | Android 14 |
| OS updates | 3 years | 4 yearsWinner |
| Security updates | 4 years | 5 yearsWinner |
Connectivity and value
| Specification | Oppo K12 Plus 5G | 14 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6 (802.11ax) | Wi-Fi 7 (802.11be) |
| Storage expansion | microSD | None |
| 3.5mm jack | No | No |
| Launch price | $279Winner | $1,299 |
Oppo K12 Plus 5G
The Oppo K12 Plus 5G is built for extreme battery endurance, packing an enormous 6,400mAh silicon-carbon battery with 80W SuperVOOC charging, 10W reverse charging, Snapdragon 7 Gen 3 silicon, 50MP Sony OIS camera, and Diamond Anti-Drop structural certification.
- Display
- 6.7"
- Chipset
- Qualcomm Snapdragon 7 Gen 3
- Main camera
- 50MP
- Battery
- 6,400mAh
Xiaomi 14 Ultra
With its Sony LYT-900 1-inch main sensor featuring stepless variable aperture from f/1.63 to f/4.0, dual periscope/telephoto lenses, 90W fast charging, and optional Leica Photography Kit, the 14 Ultra is a pure photographer’s camera.
- Display
- 6.73"
- Chipset
- Qualcomm Snapdragon 8 Gen 3
- Main camera
- 50MP
- Battery
- 5,000mAh